x canadensis var. serotina)
Flattened leaf stalk
The leaves are alternate,
rounded, 6-10 cm long, and narrow abruptly into a short point. They
are hairless, reddish-bronze when young, later bright, shiny-green above,
slightly paler below with blunt teeth along a narrow, clear margin.
The 4-10 cm leaf-stalks are strongly flattened.
is a large, deciduous tree
with erect branches up to 30 m and a long trunk with no 'bosses'
(rough swollen areas) and a coursely, but regularly fissured, grey-brown
bark. Very commonly planted in river valleys, roadsides and hedgerows.
The upright, spreading
branches are unlike the Black
Poplar in which the lowest branches arch downwards.
Only male trees
are known on which catkins, 3-6
cm long, appear in March or early April, well before the leaves, but
they soon fall.
Each male flower
has 20-25 crimson anthers.
is a hybrid between
an American species (Populus deltoides)
and the Black Poplar which
originated in France in mid-18th century: it was introduced into
Britain a little later.
males are known all trees planted have been produced by taking cuttings
- 'cloning' for over 200 years.
A valuable quick-growing
timber tree used for making hurdles, boxes and crates.